August 20 in Grinnell, through the years

Typical high: 26.9°. Hottest: 35.5° (2003). Coldest night: 10.3° (2012).

YEARHIGHLOWRAIN
2025 29.7° 20.6° 0.1 mm
2024 24° 13.9° 0.8 mm
2023 34.2° 24.2° 0 mm
2022 24.7° 17.9° 4.2 mm
2021 32.3° 20° 1.9 mm
2020 27.2° 14.7° 0 mm
2019 30.7° 21.4° 14.7 mm
2018 22.9° 19.9° 21.1 mm
2017 29.2° 18.8° 2.2 mm
2016 22.2° 15.8° 8.6 mm
2015 24.5° 11.7° 0 mm
2014 27° 17.5° 0 mm
2013 31° 19.7° 0 mm
2012 24.9° 10.3° 0 mm
2011 27.3° 18.9° 9 mm
2010 28.9° 20.8° 29.1 mm
2009 22.4° 15.5° 3.6 mm
2008 26.9° 17.7° 0 mm
2007 27° 20.9° 0.1 mm
2006 24.8° 14° 0 mm
2005 27.9° 20° 2.1 mm
2004 22.1° 10.3° 0 mm
2003 35.5° 23.9° 0 mm
2002 25.5° 13.3° 0.1 mm
2001 26° 12.6° 0 mm
2000 23.8° 17° 0 mm
1999 24.3° 14° 0.2 mm
1998 30.4° 21.2° 4.5 mm
1997 23.1° 15° 0.8 mm
1996 26.7° 17.8° 4.1 mm
Source: ERA5 reanalysis (Copernicus C3S)

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